Central Istanbul neighborhood Sultanahmet—in the Fatih district—is home to the awe-inspiring pinnacle of Byzantine architecture, the Hagia Sophia, one of the most impressive and innovative buildings of its time.
You can find an endless number of restaurants and bars a few steps away, and if you wish to walk to the Bosphorus shore, it will not take you more than 5 minutes to do so.
The tram line and metro connections are again in walking distance so reaching any part of town from this location is extremely easy.